ORIGEN : enable device tree support

Enable passing a flattened device tree to the kernel.

Signed-off-by: Angus Ainslie <angus.ainslie@linaro.org>
Acked-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>